Goldenrod soldier beetle
The Goldenrod Soldier Beetle Chauliognathus pensylvanicus is a common sight on goldenrod and other fall flowers in Indiana. These beetles spend much of their time mating or feeding on pollen in plain sight during the day. The yellow and black warning colors suggest toxicity or unpalatability.
A group of scientists* investigated the chemical defenses of these beetles. There are 9 pairs of defensive glands that secrete droplets of fluid when the beetles are disturbed….
Source: Living With Insects Blog